A game about Invaders that want to land to earth. A Tank will try to defend the invasion by fire missiles.
- The tank should move right and left at the bottom of the screen when you press the arrow keys. If you press the left arrow key, it will continue to move left at constant speed until you press the right arrow key. Tank will be stop when reach edge of screen and you need to press arrow key to move again.
- The tank should fire missiles straight up from its current position when you press the space bar.
- The invaders should appear randomly along the top of the screen and move at a 45 degree angle. When they hit a wall they will bounce off and continue at a 45 degree angle in the other direction.
- Everytime invader get hit by missile, score will be added.
- When an invader reaches the bottom of the screen, the game is over.
In order to run this file, you will need to install DrRacket first.